LACC-JNK is committed to sustainability. As fresh water depletion and water quality concerns continue to escalate, LACC-JNK is steadfast in its determination to offer water efficient solutions to our customers.
By providing Air Cooled Condensers (ACCs), LACC-JNK is helping customers avoid the red tape and permitting required when outfitting a plant with cooling technologies that require substantial water consumption.
Water Friendly Technology
With the traditional cooling systems for power plants, it is known that creating energy consumes enormous quantities of water, which is increasingly scarce in many parts of the world. For the purposes of making sound energy policy decisions, it is useful to think of water along three critical dimensions: consumption, withdrawal, and quality, and one should realize that energy production impacts water along all three dimensions, in particular by the wet cooling systems. Up to recently, one could state that power generation consumes and/or withdraws enormous amounts of water because of the wet cooling system; this is the reason why most power plants were being located close to large bodies of water.
Power plants using wet cooling systems (open loop once-through cooling and closed-loop evaporative cooling) require a vast amount of water. Unfortunately there is a tradeoff between water withdrawal and water consumption for wet cooling systems: either withdrawal is relatively high but consumption is relatively low (once-through cooling) or withdrawal is relatively low and consumption high (evaporative wet cooling systems). The good news is that all thermoelectric power plants including natural gas, coal, oil, nuclear and solar thermal also have options for alternative cooling systems (dry or hybrid). With the invention of the single row tube technology that was developed for steam condensation, air cooled condensers have become increasingly more popular in the cooling industry because these cooling systems are 100% dry – there is no water withdrawal or consumption.
Our condensers have no plume formation. This plume formation which is common on wet cooling towers can create visual “pollution” and more dangerously icing caused by blow-down on roadways under freezing conditions. More-over, the potential for air-borne bacteria and particles.
No Drift Emissions
Drift can be defined as small water particles that are discharged into the atmosphere by cooling towers. Because the drift droplets contain the same chemical impurities as the water circulating through the tower, the particulate matter constituent of the drift droplets may be classified as an emission (PM10). Although modern cooling towers are equipped with drift eliminators, a zero drift rate can only be achieved with an air cooled condenser.
Reduced Noise Impact
Since there is no dependence on cooling water, LACC-JNK Inc.’s product and the power plant can be located farther from residential areas, for example deserts, and closer to the fuel source. LACC-JNK Inc. uses low noise fans in their design that meet all industry standards.
Minimum Ambient Temperature Rise
An ACC rejects warm air into the atmosphere; however, due to the large air flow rates involved, the air temperature rise is very limited. Using our in-house CFD capabilities and experts in dry cooling, it could be shown that in cases where an ACC is destined to be in a residential area, there is little or no impact on the ambient temperature even at elevated wind speeds. Below is an example of such a CFD analysis
Zero Blow-Down System
With evaporative cooling towers, some water has to be intentionally drained from the cooling tower to keep the buildup of dissolved solids to levels below the solubility limit. The water drained from the cooling tower to control buildup of scale forming dissolved solids is known as blow-down. Although with the help of modern water treatment technologies the amount of blow-down in cooling towers can be reduced, zero blow-down cannot be achieved. With ACC’s, there is no blow-down at all so it is a zero blow-down cooling technology since there is no waste water that is produced by the cooling system.
Reduced Health Risk
Legionnaires disease in humans has been scientifically associated with cooling towers and is caused by Legionella bacteria. Transmission occurs via exposure to aerosols, which can originate from cooling towers – the inhalation of mist droplets containing the bacteria can be lethal if Legionella species are present in the cooling water. Since an air cooled condenser is a dry cooling technology with the condensate flowing in a closed loop system, no aerosols are generated and consequently there is no risk for Legionnaires disease.
Environmentally Friendly Technology
Drift that occurs with evaporative cooling towers, may impact the nearby agriculture through deposits of salts which can affect the growth of certain plant species; this is not the case with dry cooling systems. Moreover, cooling tower blow-down has both a high dissolved solids content and often contains substantial amounts of toxic materials, primarily biocides. The high dissolved solids and biocide content of cooling tower blow-down create an adverse environmental impact when discharged to the public sewers or surface waters – as an alternative, an ACC can be used which is a true zero blow-down cooling technology. Evidently, ACC’s cannot cause the killing of fish and shellfish, or do not increase the water temperature as is the case for water intake structures of once-through cooling systems.